On Thu, 30 Oct 2008 18:25:17 -0500, Alan Ackerman <[EMAIL PROTECTED]> wrote:
>I got asked: > >Does z/VM impose non-insignificant overhead? Is it similar to VMware , in >which virtual I/O imposes significant overhead, but most processor and >memory access runs at close to native physical speed? > >I dont know anything about VMWARE so I could not answer the question. I >know that CCW Translation in VM costs significant cycles. > >I think FCP disks < dedicated DASD < fullpack minidisks < small minidisk s. >I would HOPE that the zSeries, with so much of virtualization built into >the hardware, would have lower costs than VMWARE, but I dont really k now. > >Any takers? I'm hesitant to mention this, since I would have thought it would be brou ght up by others, but last I knew, VMWare doesn't have anywhere the performan ce monitoring capabilities that z/VM does. It has some minor SNMP http://pubs.vmware.com/esx254/admin/wwhelp/wwhimpl/common/html/wwhelp.htm ?context=admin&file=esx25admin_snmp.8.1.html but that appears to be the limit of its function. /ahw > >Are there any web sites that give performance comparisons VM versus VMWA RE? > >Alan Ackerman >Alan (dot) Ackerman (at) Bank of America (dot) com >======================== ========================= =======================
